<!doctype html>
<html>
<head>
    <meta charset="utf-8"/>
</head>
<body>
<h1 style="text-align: center;color: red">open console please</h1>

<div class="l1">
    <ul class="l2">
        <li>
            <ul>
                <li>
                    1
                </li>
                <li>
                    2
                </li>

            </ul>
        </li>
    </ul>
</div>

<script src="/kissy/build/seed.js"></script>
<script src="/kissy/tools/third-party/sizzle.js"></script>
<script>
    var els = Sizzle('div.l1 > .l2 li:nth-child(2)');
    S.log(els);
</script>
</body>
</html>